16422639 has 4 divisors (see below), whose sum is σ = 21896856. Its totient is φ = 10948424.

The previous prime is 16422617. The next prime is 16422641. The reversal of 16422639 is 93622461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16422639 - 2⁵ = 16422607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16422649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2737104 + ... + 2737109.

It is an arithmetic number, because the mean of its divisors is an integer number (5474214).

Almost surely, 2^16422639 is an apocalyptic number.

16422639 is a deficient number, since it is larger than the sum of its proper divisors (5474217).

16422639 is an equidigital number, since it uses as much as digits as its factorization.

16422639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474216.

The product of its digits is 15552, while the sum is 33.

The square root of 16422639 is about 4052.4855335954. The cubic root of 16422639 is about 254.1836716862.

The spelling of 16422639 in words is "sixteen million, four hundred twenty-two thousand, six hundred thirty-nine".